How many movies have Hiroshi Kato and Tomohiro Kawahara collaborated on?

They have worked on 3 movies together! Their first movie together was Monster Strike The Movie: To The Place of Beginnings (2016) while their highest rated movie together was City Hunter: Shinjuku Private Eyes (2019). They have not worked together since City Hunter: Shinjuku Private Eyes (2019). They are most known for their animation films together.